diff --git a/frontend/vendor/libweblabel.mjs b/frontend/public/vendor/libweblabel.js
similarity index 100%
rename from frontend/vendor/libweblabel.mjs
rename to frontend/public/vendor/libweblabel.js
diff --git a/frontend/vendor/libweblabel.wasm b/frontend/public/vendor/libweblabel.wasm
similarity index 100%
rename from frontend/vendor/libweblabel.wasm
rename to frontend/public/vendor/libweblabel.wasm
diff --git a/frontend/src/views/Print.vue b/frontend/src/views/Print.vue
index 1b4724f..28d0908 100644
--- a/frontend/src/views/Print.vue
+++ b/frontend/src/views/Print.vue
@@ -98,9 +98,13 @@ import {markRaw, nextTick} from "vue";
 import QRCode from "qrcode";
 import BaseLayout from "@/components/BaseLayout.vue";
 
-import {MultiPrinterBlob, canvasToBitmap, bitmapToCanvas} from "../../vendor/weblabel.mjs";
+import {MultiPrinterBlob, canvasToBitmap, bitmapToCanvas} from "../../vendor/weblabel.js";
 
-const BLOB_URL = new URL("../../vendor/libweblabel.mjs", import.meta.url).href;
+// Served verbatim from public/vendor/ rather than bundled: libweblabel.js's
+// own emscripten glue resolves its .wasm sibling relative to *its own*
+// import.meta.url at runtime, so both files need to keep sitting together,
+// unhashed, at a stable URL - not a Vite-fingerprinted asset path.
+const BLOB_URL = "/vendor/libweblabel.js";
 
 const MAX_ZOOM = 4;			/* never magnify the preview more than this */
 const TRAILING_PADDING_PX = 3;		/* blank columns after the cut, same idea as the leading margin */
diff --git a/frontend/vendor/weblabel.mjs b/frontend/vendor/weblabel.js
similarity index 100%
rename from frontend/vendor/weblabel.mjs
rename to frontend/vendor/weblabel.js